I just got my winter wheels/tires put on - my "summer" setup was the 245/35/R19 front and 265/35/R19 Pilot Sport PS2's... Now I'm at a "square" setup of 235/40/R18 Pilot Alpin PA3's.

Seems like for the few days I've had this setup, the car's ride seems smoother (temps ranging between about 30-45F) - just out of curiosity - is this because of the rubber compound in the PA3's being softer, vs. the higher sidewall (or a combination of both factors)? Anyone else with this winter setup have similar observations?